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Ultrasound elastography is the method to image the elasticity of complianttissues due to a mechanical compression applied to it. In elastography, thelocal strain of explored tissue is estimated by analyzing the echo signals.This is accomplished by a sonographer who uses ultrasound transducer to applypressure on the tissue area causing displacement of the tissue. A set of datais obtained before and after the compression. This stress along the axialdirection not only causes deformation in that direction but it can also causelateral deformation in the tissue. This relative deformation is latercalculated using tracking algorithms. Finally, estimating the elasticity,images are formed. In this paper, we introduce a novel strain estimator. Theproposed 1.5D strain estimator uses 1D windows for swift computations andsearches the lateral direction for taking the non-axial movement into account.We have investigated the performance of our estimator using simulated andin-vivo data of breast tissue. The performance of our method is verified bycomparing with different methods up to 16\% applied strain. The proposedestimator has exhibited a superior performance compared to the conventionalmethods. The image quality significantly improves, especially in the presenceof higher applied strain, when the non-axial motion is significant.

Imrpoving Strain Estimation in Breast Ultrasound Images Using Novel 1.5D Approach (Simulation and In-vivo results